Two resistances 1Ω and 3Ω are connected in series and then in parallel. The ratio of the effective resistance of series and parallel combination of resistance is *

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.